Agilent Technologies 53152A Manual de Instruções Página 121

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Appendix C Using the Battery Option
Operating the Counter from a DC Power Source
Operating Guide C-3
C
When all three segments of the battery annunciator are activated, the
battery charge level is at 83% or more. When only two segments are
activated, the charge level is approximately 50%, and when only the first
segment is activated, the charge level is approximately 17%.
A pair of fully charged batteries in good condition provides enough power
to operate the Counter for approximately three hours at 25º C. Various
conditions, such as ambient temperature and the measurement configuration,
can affect the length of time the Counter can operate from a fully charged
set of batteries.
A battery that reads approximately 13.6 VDC when measured with a
voltmeter (or the Battery Voltage reading in the menu display) is fully
charged. A battery that reads 11 VDC or less is at or near the minimum
effective charge level.
NOTE Operating the Counter with the display backlight turned off lengthens the
time the Counter can operate from the batteries. When operating from
battery power, the Counter automatically turns the backlight off after five
minutes if no front-panel keys are pushed, no GPIB commands are
received, and/or no signal is applied to either input during that period.
Operating the Counter from a
DC Power Source
Counters that have the Battery option can operate from an external DC
power source (with or without batteries in the Counter). The external DC
power source must supply +11 to +18 VDC at 2.0 A (min.). It must use a
2.1 mm coaxial plug, and its DC output plug must be wired so the inner
connector is positive and the outer connector is negative. To use an
external DC power source, make sure the Main ~ Power switch on the back
panel is set to 1 (on), insert the coaxial plug into the EXT DC socket on
the back panel as shown in Figure C-2, and turn the Counter on in the
normal manner.
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